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We started the study using 10 eq. of ethyl acetate using 10% mol of the catalyst at room temperature and at 90oC. Next, aiming a better production of triacetin we increased to 30 eq. ratio of ethyl acetate. The results are summarized in table 1. With 10 eq. of ethyl acetate at room temperature a large amount of glycerol remained not reacted, in these cases the monoacetin is the major product, entries 1 and 2. At 90oC almost all glycerol was consumed, the diacetin is the major product entries 3 and 4. When a 30 eq. ratio of ethyl acetate was used at 90oC all glycerol was consumed and a larger amount of diacetin was produced. Dry Amberlyst A15 (A) showed to be e better catalyst than Amberlyst A-16 (B). The kinetic of glycerol transformation and products distribution in the equilibrium to the best catalyst, (entry 5) was measured, Figure 2. .Table 1. Reactions conditions: Entry Cat. Temp. Glycerol Mono. Dia. Tri.

Acetins Production via Transesterification of Ethyl Acetate with Glycerol Using Heterogeneous Acid Catalysts.